I made this last night while I was stuck offline on PHPDev. It seems to work great and requires no installation unless your server configuration prevents file creation through fopen()

Feel free to add updates/upgrades as you see fit.

Using browser() by Geoffrey Sneddon with some help from Clayton Smith.

tracker.php - About 313 lines

<?php

// Hit/Log tracker with Browser Lookup support.
// Browser Lookup by Geoffrey Sneddon, with some help from Clayton Smith.
// Rest of the script by Jordan S. C. Thompson (Hendee).
// Released under the zlib/libpng license.

// December 15, 2005

// This file's code should either be placed in the file you want it displayed or include it.
// If you include be sure to specify where the log files are in $dir.